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12. The group of 20 plasma proteins that are part of the 2nd and 3rd lines...

12. The group of 20 plasma proteins that are part of the 2nd and 3rd lines of defense is called _________________________ and it assists in destroying foreign substances.

17. ______________ immunity is directed against pathogens within the cells. This immunity involves ____ lymphocytes.

Science   Anatomy-And-Physiology   
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Answer #1

Answer 12;

The group of 20 plasma proteins that are part of 2nd and 3rd line of defence is called COMPLEMENT SYSTEM and it assist in destroying foreign substances.

(Complement system destroys foreign substances by increasing the action of phagocytic cells and antibodies)

Answer 17:

CELLULAR immunity is directed against pathogens within the cells. This immunity involves T lymphocytes.

(Cellular immunity takes place within the infected cells and it involves T lymphocytes and on the other hand Humoral immunity takes place outside the infected cells and it involves B lymphocytes)

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